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Reductive thiocyanolysis of tetraoxorhenate (VII): Synthesis, crystal structure, catalytic oxidation and kinetic studies of (PPh4)2[Re(NCS)6] and (PPh4)2[ReO(NCS)5] |
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| Authors: | Subhajit Dinda Sujoy RoyChowdhury KM Abdul Malik Ramgopal Bhattacharyya |
| Institution: | a Department of Chemistry, Jadavpur University, Kolkata 700 032, India b Department of Solid State Physics, Indian Association for the Cultivation of Science, 2A, 2B Raja S.C. Mullick Road, Jadavpur, Kolkata 700 032, West Bengal, India c Department of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK d Department of Chemistry, University of Cardiff, P.O. Box 912, Park Place, Cardiff CF 10 3TB, UK |
| Abstract: | Thiocyanate ions reduce perrhenate  in aqueous acidic solution, and on addition of a suitable countercation (PPh4Cl) afford (PPh4)2Re(NCS)6] (1) and (PPh4)2ReO(NCS)5] (2), which have been confirmed by X-ray crystallography. The kinetics of the above reaction has been studied. Both the complexes exhibit efficient and highly selective catalytic epoxidation ability in the presence of NaHCO3 as a co-catalyst and competent catalytic properties in the selective oxidation of alcohols to the corresponding aldehydes or ketones in the presence of pyrazole as an additive and sulfides to sulfoxides and sulfones. H2O2 was used as the terminal oxidant in all the above-mentioned oxidation reactions. |
| Keywords: | Rhenium complexes Reductive thiocyanolysis Epoxidation of olefins Oxidation of alcohols X-ray crystallography Kinetics |
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